Engine cooling system



April 21, 1936. w DAV|$ 2,037,708

' ENGINE COOLING SYSTEM Filed Dec. 18, I951 INVENTOR fi a lierffiauls BY 7 47M 6 W ATTORNEY Patented Apr. 21, 1936 UNITED STATES ENGINE COOLING SYSTEM Walter F. Davis, Nassau County, N.

to Fail-child Aviation Corporation, N. Y., a corporation of Delaware Y., assignor New York,

Application December 18, 1931, Serial No. 581,852 2 Claims. (Cl. 123-171) This invention relates to air cooling devices for internal combustion engines and has for an object to provide an air cooling system for positively cooling not only the cylinder walls but the cylinder heads as well.

It has been the conventional practice to pro: vide radiating fins on the cylinder walls of separately cast cylinders but such .conventional air cooling systems have made no provision for positively cooling the cylinder heads.

It is therefore an object of this invention to provide the cylinder walls and the cylinder heads with efiicient radiating surfaces and to provide air deflectingdevices to insure the proper passage of air so that the radiating surfaces will perform the dual function of accomplishing radiation and of forming air passageways for insuring the maximum ,cooling efiect where a cooling medium is most needed.

With the foregoing and other objects in view, the invention consists in the combination of parts, and in the details of construction hereinafter set forth in the following specification and appended claims, certain embodiments thereof being illustrated in the accompanying drawing, in which:

Figure 1 is a view. in side elevation of a portion of the engine showing the engine cylinders and their lateral fins, and also the deflecting baiiies.

Figure 2 is a view in cross section along line 2-2 of Figure 1 through the cylinders, showing the lateral fins, and in dotted lines the longitudinal fins on the cylinders, and also the deflecting bailles carried by the camshaft housing adjacent the cylinder heads.

Figure 3 is a view in section along line 3-4 of Figure 1 showing an end view of one of the cylinders and the camshaft housing in-cross'section; also showing the baiile in full lines and the longitudinal fins on the cylinder head in dotted lines.

Referring more particularly to the drawing, the particular engine described herein in connection with the invention is one having its cylin-- ders I, 2, 3, and l inverted, in line, and separately cast, and in which the camshaft 5 and housing 6 therefor is located below and in spaced relation with the cylinder heads. However, the cooling system is not limited in its application, .nor is the inzgtion limited to the particular engine discl to the crankcase I and the cylinders I, 2, 3, and 4 are provided with substantially lateral fins I, 2', l', and 4' respectively encircling each cylinder. The cylinder heads II, II, II, and ii are provided may be of greater area than those for the cylinder walls.

In addition to these lateral to longitudinal fins HI, It. and II on the under- 'as parallel with Each cylinder is shown separately connected with similar lateral fins ill, I I, i2, and I! which fins the cylinder heads have secured thereto or cast therewith neath sides of the cylinder heads I0, I I, I2, and 13,

respectively. The arrangement of the engine ports is such as to allow for suitable space between the cylinder heads and the camshaft housing for the attachment or casting on the top of the camshaft housing a series of diagonal bailies i8, i9, 20, and 2i.- These baiiles in reality extend upwardly from the cam shaft housing to a greater height than the lower extremity of the cylinder heads but are arranged diagonally between and o in overlapping relation to the adjacent cylinder walls. In the preferred embodiment, as shown particularly in Figure 2, the engine cowling 22 may be arranged on the exhaust side ofthe engine, the exhaust pipes for the cylinders being indicated at 23. o

The inrushing air flowing in the direction indicated by the arrow is allowed to pass freely between thecylinder walls but the bailles l8, l9 etc., positively deflect the air so as to force the air to flow across the cylinder heads between the longitudinal radiating fins; l4, l5, etc. The fins thus perform the dual function of acting as a radiating surface and as a passageway for the cooling air. While the longitudinal fins l4, 15, etc., are shown the line in which the cylinders are arranged, it may be desirable to dispose them at an angle more in keeping with the angle of disposition of the baflles l8, l9, etc., so that the fiow of air after deflection by the baiiles will be less obstructed.

This invention is not'limited to any design of cowling or means for cooling the cylinder walls, nor is it limited to the particular engine illustrated. It does provide for an-efiicient and positive' system for utilizing a flow of airto cool the cylinder heads of an internal combustion engine or the like.

I claim:

to not only allow for this but also to allow 1. In an internal combustion engine comprising a plurality of separated cylinders, an air cooling system including a cowling, a plurality of substantially longitudinal radiating fins arranged on the head of each cylinder, a series of bailes extending diagonally between the cylinder heads and in overlapping relation thereto, for insuring a flow of air collected by said cowling across the head of each cylinder and between radiating fins arranged thereon.

2. In an internal combustion engine comprising a plurality of separated cylinders, an air cooling system including a cowling. a pluralityv of substantially longitudinal radiating fins arranged on the head of each cylinder, a series of baflies extending between cylinder heads for insuring a flow of air collected by said cowling across the head of each cylinder and between the radiating fins arran ed thereon.

' WALTER F. DAVIS. 

